This chapter describes the available localization features from
the point of view of the administrator. PostgreSQL supports two localization
facilities:

Using the locale features of the operating system to provide
locale-specific collation order, number formatting, translated
messages, and other aspects. This is covered in Section 22.1 and Section
22.2.

Providing a number of different character sets to support
storing text in all kinds of languages, and providing character set
translation between client and server. This is covered in Section 22.3.